This is likely a Base32 or UUID-style hash. Servers use these to ensure that every uploaded file has a completely unique name, preventing one user's "video.mp4" from overwriting another's.
Since the filename is randomized, the content could be anything from a viral meme to a personal recording. If you did not intentionally download this file or do not recognize the source website, before opening it, as randomized filenames are occasionally used in phishing or malware delivery. 0hbmbb1tzglkvu2g9g40i_source.mp4
If you were watching a video on a social media site and checked your downloads or temporary internet files, the site may have saved it under this encoded name. This is likely a Base32 or UUID-style hash
Because this string is a specific hash or internal ID, there is no public "article" or documentation associated with it. However, Technical Breakdown of the Filename If you did not intentionally download this file
If you recently ran file recovery software, it often assigns these strings to files where the original metadata (the real name) was lost. Safety and Content